Diaphragm.



W.E.zmRnEM DIAPHRAGNI.

APPLICATION FILED AUG. 9, 1915.

LIUI Patented Apr. 18, 1916.

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THB COLUMBIA PLANOcRAPH 0.. WASHINGTON. D. C'

WILLIAM E. ZERDEN, JOHNSONBURG, PENNSYLVANX.

DIAPHRAGM.

Specification of Letters Patent.

Patented Alpin 16, 1916.

Application filed August 9, 1915. Serial 1t o. 411,635.

To all whom t may concern Be it known that l, nWILLnirat E. ZinnDnN, a citizen of the United States, residing at JOhnSOnburg, in the county of Elk and State of Pennsylvania, have invented certain new and useful lmprovenients in Diaphragins; and l do hereby declare the i'ollowing to be a lull, clear, and exact description of the invention, such as will enable others skilled in the art to which it apperl'ains to make and use the same.

rlihis invention relates to diaphragme for use in conjunction with fluid under pressure for regulating and similar purposes, and has for an object to provide a diaphragm presenting the requisite flexibility but embodying means to prevent crystallization and iracturing under the usual contingencies of operation.

ln the use of expansible diaphragme for fluid pressure regulation it has been demonstrated that after being used some time the material of the diaphragm becomes crystallized, especially adjacent the periphery, and fractures by reason oi such crystallization.

The object oit the present invention is to produce a diaphragm composed of material increasing in thickness toward its periphery, possessing the necessary flexibility by reason of the thinness of the material adjacent the center whereby both flexibility and resistance to crystallization and fracture are provided.

`With these and other objects in view the invention consists in certain novel features of construction, combination and arrangement of parts as will be hereinafter more fully described and claimed.

|The drawing shows a number of the diaphragms connected together in ordinary working order, part being shown in diametrical section, and others in edge elevation.

The drawing as above noted shows a pluf rality of the diaphragms connected each with the other, but it is to be understood that while this is a customary manner of employing these diaphragme the invention resides in a single diaphragm only, or in merely one side of a diaphragm as shown, irrespective of the manner in which it may be connected to any adjacent diaphragme or other bodies.

its shown in the drawings,the diaphragm plate 10 is produced of any desired shape but preferably, though not necessarily, circular, and also preferably though not necessarily having a central opening 11 into which a nipple 12 is inserted from the inside, having an enlarged head 13 bearing against the inner surface of the plate 10 and with a collar 1-1 screwed down upon the nipple upon the exterior of the plate 10 to produce a fluid-tight joint, solder or other ordinary attaching means being used when found desirable. 1t will be noted that the thickness oli the plate 10 increases from the center to an annular rib 15 at the periphery. When used in conjunction with another similar plate to form a complete diaphragm expansible on both sides, the equivalent plate 16 is secured to the plate 10 at the periphery in any approved manner as by the use of the rivets 17, also supplemented by solder if found desirable. Before the two plates 10 and 16 are put together the plate 16 is provided with a nipple 18 having a head 19 upon the inner surface of the plate 16, the exterior threaded surface of the nipple 18 being of the proper size to screw into the internally threaded nipple 12, the collars 14; may also serve as spacers between the several pairs of plates if desired. @ne of the enlarged heads as 13 or 19, here shown as the head 19, is provided with a plurality of radial grooves 20 which serve to admit the -Fluid from the central openings of the stack of nipples 18 to the chamber interlying the plates 10 and 16 so that communication is always open between the central passage for the fluid and the space between the diaphragm plates even when the plates are contracted to closed position as shown in the drawing.

lt is obvious that under certain conditions the extreme plate need not be provided with a central opening as indicated at 21, the plate being entirely imperforate and bear-l ing against any conveniently disposed body as 22 which may be stationary or movable as circumstances may make necessary or desirable.

It will be understood that the invention resides in one only of the plates 10 or 16 irrespective of the manner in which it is connected to other plates or other bodies,

such connection or use covering the entire field of utility for such eXpan'sible dia-V phragnis.

' What is claimed is kl. In a device ofthe class deseribed,'a plurality of plates spaced apart and each provided with a central opening, said plates increasing in thickness uniformly from lthe opening to a point distant therefrom and loeing connected near their outer edges, a

v threaded nipple having a flanged head pass# ing through the opening of each plate, the nipples 1neing reversely arranged With their heads adjacent to each othen 2. Ina device of the class described, a plurality'of platesspaced apart and each provided with a central opening, saidY plates increasing'in thickness uniformly from the opening to al point distant therefrom and beingconnected near their outer edges, a threaded nipple having a flanged head pass* ing through the opening of each plate, the nipples being reversely arranged with their heads adjacent to each other, and one of the nipples having an internal bore larger than the other for receiving a nipple connected with an adjacent plate.

3. As anV article of manufacture, a diavphragni for a pressure regulating device,

TILLAM E. ZIERDEN.

Vitnesses ERNEsT B. ZIERDEN, W. 0. Ronisozv.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

